Abstract: A method and/or electrochemical cell for utilising one or more gas diffusion electrodes (GDEs) in an electrochemical cell, the one or more gas diffusion electrodes have a wetting pressure and/or a bubble point exceeding 0.2 bar. The one or more gas diffusion electrodes can be subjected to a pressure differential between a liquid side and a gas side. A pressure on the liquid side of the GDE over the gas side does not exceed the wetting pressure of the GDE during operation (in cases where a liquid electrolyte side has higher pressure), and/or a pressure on the gas side of the GDE over the liquid side, does not exceeds the bubble point of the GDE (in cases where the gas side has the higher pressure).

Abstract: A method and/or electrochemical cell for utilising one or more gas diffusion electrodes (GDEs) in an electrochemical cell, the one or more gas diffusion electrodes have a wetting pressure and/or a bubble point exceeding 0.2 bar. The one or more gas diffusion electrodes can be subjected to a pressure differential between a liquid side and a gas side. A pressure on the liquid side of the GDE over the gas side does not exceed the wetting pressure of the GDE during operation (in cases where a liquid electrolyte side has higher pressure), and/or a pressure on the gas side of the GDE over the liquid side, does not exceeds the bubble point of the GDE (in cases where the gas side has the higher pressure).

Abstract: A method and/or electrochemical cell for utilizing one or more gas diffusion 5 electrodes (GDEs) in an electrochemical cell, the one or more gas diffusion electrodes have a wetting pressure and/or a bubble point exceeding 0.2 bar. The one or more gas diffusion electrodes can be subjected to a pressure differential between a liquid side and a gas side. A pressure on the liquid side of the GDE over the gas side does not exceed the wetting pressure of the GDE during 10 operation (in cases where a liquid electrolyte side has higher pressure), and/or a pressure on the gas side of the GDE over the liquid side, does not exceeds the bubble point of the GDE (in cases where the gas side has the higher pressure).

Abstract: Disclosed are electrochemical cells and methods of use or operation at high pressure, in which one or more gas-producing electrodes operate in a manner that is bubble-free or substantially bubble-free. Disclosed is a method for producing a gas in an electrochemical cell, and the electrochemical cell itself, wherein the electrochemical cell comprises a gas-producing electrode and a counter electrode being separated by an electrolyte. The method comprises creating an electrolyte pressure greater than or equal to 10 bar during operation of the electrochemical cell, and producing the gas wherein substantially no bubbles of the gas are formed at the gas-producing electrode. Preferably, there is no diaphragm or ion exchange membrane positioned between the gas-producing electrode and the counter electrode. In another example, the electrochemical cell is operated without a gas compressor. The gas-producing electrode and/or the counter electrode is a gas diffusion electrode.

Abstract: Disclosed are electrochemical cells and methods of use or operation, in which one or more gas-producing electrodes operate in a manner that is bubble-free or substantially bubble-free. Disclosed are electrochemical cells and methods of operation or use under conditions of intermittent and/or fluctuating currents. In one aspect there is provided a method for operating an electrochemical cell, and an electrochemical cell, wherein the electrochemical cell comprises: a gas-producing electrode; a counter electrode, the gas-producing electrode and the counter electrode being separated by an electrolyte. Preferably there is also provided one or more void volumes. The method comprises: supplying an intermittent and/or fluctuating current to at least the gas-producing electrode; and producing a gas at the gas-producing electrode as a result of an electrochemical reaction. Preferably the gas is received by the one or more void volumes.